Swim fin with fabric foot pocket

ABSTRACT

A swim fin comprises a symmetrical fin blade. The symmetrical fin blade has a symmetrical foot pocket receiving portion, a tip portion, a blade deck, and side ribs extending from the symmetrical foot pocket receiving portion to the tip portion along side portions of the blade deck. The symmetrical foot pocket receiving portion has a support portion extending generally parallel to the blade deck. A symmetrical fabric foot pocket is joined to an upper surface of the symmetrical fin blade at the symmetrical foot pocket receiving portion. A symmetrical sole is joined to a lower surface of the symmetrical fin blade at the symmetrical foot pocket receiving portion. The symmetrical sole has a base portion extending generally parallel to the blade deck.

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates generally to swim fins. Moreparticularly, the present invention relates to a swim fin with a fabricfoot pocket.

[0003] 2. Description of the Related Art

[0004] Swim fins are used in a variety of water sports and recreationalactivities, as well as in many professional endeavors. A swim fin may beworn on a user's foot while swimming to generate propulsive forces thatare greater than the propulsive forces that can be generated without aswim fin. The swim fin allows the user to swim faster and have greatercontrol over the user's movement in the water. Accordingly, swim finsare popular with many athletes and professionals.

[0005] Some swim fins are molded from plastic or rubber material. Somefoot holding elements of swim fins are also formed of molded plastic orrubber material. Some of these foot holding elements are generallyuncomfortable for a user. The foot holding elements may fit imperfectlyor irritate the user's foot after extended use.

[0006] Additionally, some fins are formed with asymmetrical blades orasymmetrical foot holding elements. Some fins are also formed with footholding elements that are angled relative to portions of the fin blade.Some of these fins may generate unwanted forces on the user's feet,ankles and knees as the user swims. Additionally, some of these fins areexpensive to produce.

[0007] Additionally, other features of traditional swim fins haveinherent inefficiencies in their construction that reduce propulsiveforces and create drag on the fin.

SUMMARY OF THE INVENTION

[0008] Features of a preferred embodiment of the present inventionimprove upon conventional swim fins with the use of a fabric foot pocketand other improved fin features. Features of a preferred embodiment ofthe present invention maximize propulsive forces, minimize injury to theuser and reduce manufacturing and production costs of swim fins. Some ofthe applications and configurations of the improved swim fin will bediscussed below. It should be noted that the following discussionrelates to several distinct features and not all of the features need tobe present in any single embodiment of the present invention. Thus, someof the features may be used with other features in some applicationswhile other applications will only reflect one of the features.Moreover, the features, aspects and advantages of the invention, asrecited in the appended claims, can be applied in still otherconfigurations within the scope of the invention, which will becomeapparent to those of ordinary skill in the art.

[0009] Accordingly, in one embodiment of the invention, a swim fincomprises a symmetrical fin blade having a foot pocket receivingportion. A fabric foot pocket is joined to an upper surface of thesymmetrical fin blade at the foot pocket receiving portion.

[0010] In yet another embodiment, a swim fin comprises a fin bladehaving a symmetrical foot pocket receiving portion. A symmetrical fabricfoot pocket is joined to an upper surface of the fin blade at thesymmetrical foot pocket receiving portion.

[0011] In still another embodiment, a swim fin comprises a fin bladehaving a foot pocket receiving portion, a tip portion, a blade deck, andside ribs extending from the foot pocket receiving portion to the tipportion along side portions of the blade deck. The foot pocket receivingportion has a support portion extending generally parallel to the bladedeck. A fabric foot pocket is joined to an upper surface of the finblade at the foot pocket receiving portion.

[0012] A further embodiment involves a swim fin comprising a fin bladehaving a foot pocket receiving portion, a tip portion, a blade deck, andside ribs extending from the foot pocket receiving portion to the tipportion along side portions of the blade deck. The fin blade has filletsalong intersections of the side ribs and the blade deck. A fabric footpocket is joined to an upper surface of the fin blade at the foot pocketreceiving portion.

[0013] According to another embodiment, a swim fin comprises a fin bladehaving a foot pocket receiving portion, a tip portion, a blade deck, andside ribs extending from the foot pocket receiving portion to the tipportion along side portions of the blade deck. The fin blade has aplurality of grooves on upper and lower surfaces of the blade deckextending from the foot pocket receiving portion to the tip portion. Afabric foot pocket is joined to an upper surface of the fin blade at thefoot pocket receiving portion.

[0014] In another embodiment, a swim fin comprises a fin blade having afoot pocket receiving portion. A fabric foot pocket is joined to anupper surface of the fin blade at the foot pocket receiving portion. Thefabric foot pocket has an upper portion and a lower portion. The upperportion has a first stretchable fabric layer, a second less-stretchablefabric layer disposed over at least a portion of an upper surface of thefirst stretchable fabric layer, and a heel strap portion with a bucklehaving a double bar configuration.

[0015] In still another embodiment, a swim fin comprises a fin bladehaving a foot pocket receiving portion. A fabric foot pocket is joinedto an upper surface of the fin blade at the foot pocket receivingportion. The fabric foot pocket has an upper portion and a lowerportion. The upper portion has a first stretchable fabric layer, asecond less-stretchable fabric layer disposed over at least a portion ofan upper surface of the first stretchable fabric layer, and a heel strapportion with a strap keeper loop.

[0016] In a further embodiment, a swim fin comprises a fin blade havinga foot pocket receiving portion. A fabric foot pocket is joined to anupper surface of the fin blade at the foot pocket receiving portion. Thefabric foot pocket has an upper portion and a lower portion. The lowerportion extends generally parallel to the upper portion.

[0017] According to another embodiment, a swim fin comprises a fin bladehaving a foot pocket receiving portion. A fabric foot pocket is joinedto an upper surface of the fin blade at the foot pocket receivingportion. The fabric foot pocket has an upper portion and a lowerportion. The lower portion has a stretchable fabric bottom layerdefining multiple drain holes. The multiple drain holes include aprimary drain hole and a series of smaller secondary drain holes. Theseries of smaller secondary drain holes include drain holes beingdefined such that the series of smaller secondary drain holes extendsfurther toward a toe region and side portions of the stretchable fabricbottom layer than the primary drain hole extends.

[0018] In yet another embodiment, a swim fin comprises a fin bladehaving a foot pocket receiving portion, a tip portion, a blade deck, andside ribs extending from the foot pocket receiving portion to the tipportion along side portions of the blade deck. A fabric foot pocket isjoined to an upper surface of the fin blade at the foot pocket receivingportion. A sole is joined to a lower surface of the fin blade at thefoot pocket receiving portion. The sole has a base portion extendinggenerally parallel to the blade deck.

[0019] In another embodiment, a swim fin comprises a symmetrical finblade. The symmetrical fin blade has a symmetrical foot pocket receivingportion, a tip portion, a blade deck, and side ribs extending from thesymmetrical foot pocket receiving portion to the tip portion along sideportions of the blade deck. The symmetrical foot pocket receivingportion has a support portion extending generally parallel to the bladedeck. The symmetrical fin blade has fillets along intersections of theside ribs and the blade deck. The symmetrical fin blade has a pluralityof grooves on upper and lower surfaces of the blade deck extending fromthe symmetrical foot pocket receiving portion to the tip portion. Asymmetrical fabric foot pocket is joined to an upper surface of thesymmetrical fin blade at the symmetrical foot-pocket receiving portion.The symmetrical fabric foot pocket has an upper portion and a lowerportion. The upper portion has a first stretchable fabric layer, asecond less-stretchable fabric layer disposed over at least a portion ofan upper surface of the first stretchable fabric layer, and a heel strapportion with a strap keeper loop and a buckle having a double barconfiguration. The lower portion extends generally parallel to the upperportion and has a stretchable fabric bottom layer defining multipledrain holes. The multiple drain holes include a primary drain hole and aseries of smaller secondary drain holes. The series of smaller secondarydrain holes include drain holes defined such that the series of smallersecondary drain holes extends further toward a toe region and sideportions of the stretchable fabric bottom layer than the primary drainhole extends. A symmetrical sole is joined to a lower surface of thesymmetrical fin blade at the symmetrical foot pocket receiving portion.The symmetrical sole has a base portion extending generally parallel tothe blade deck. The symmetrical sole and the symmetrical fin bladedefine multiple drain holes generally corresponding to the multipledrain holes defined in the stretchable fabric bottom layer of the lowerportion of the symmetrical fabric foot pocket.

[0020] According to another embodiment, a method of making a swim fincomprises the steps of forming a fin blade having a symmetrical footpocket receiving portion, a tip portion, a blade deck, and side ribsextending from the symmetrical foot pocket receiving portion to the tipportion along side portions of the blade deck. Forming a symmetricalfabric foot pocket having an upper portion and a lower portion. Theupper portion has a first stretchable fabric layer, a secondless-stretchable fabric layer disposed over at least a portion of anupper surface of the first stretchable fabric layer, and a heel strapportion. The lower portion extends generally parallel to the upperportion and has a stretchable fabric bottom layer. Joining thesymmetrical fabric foot pocket to an upper surface of the fin blade atthe symmetrical foot pocket receiving portion.

[0021] In another embodiment, a method of making a symmetrical fabricfoot pocket comprises the steps of forming an upper portion of asymmetrical fabric foot pocket by having a first stretchable fabriclayer with a curved end, and side portions. Placing a secondless-stretchable fabric layer with a curved end, and side portions overat least part of an upper surface of the first stretchable fabric layer.Joining the first stretchable fabric layer to the secondless-stretchable fabric layer, and attaching a heel strap to at leastpart of the first stretchable fabric layer and at least part of thesecond less-stretchable fabric layer. Forming a lower portion of thesymmetrical fabric foot pocket by having a stretchable fabric bottomlayer with a curved end, and side portions, and defining at least onedrain hole in the stretchable fabric bottom layer. Placing the upperportion of the symmetrical fabric foot pocket over the lower portion ofthe symmetrical fabric foot pocket such that the curved ends of thefirst and second layers of the upper portion are aligned with the bottomlayer of the lower portion and such that the upper and lower portionsare generally symmetrical about a longitudinal centerline. Joining theupper portion of the symmetrical fabric foot pocket with the lowerportion of the symmetrical fabric foot pocket around the curved ends andalong the side portions such that the upper and lower portions form apocket having an opening at an end opposite the curved ends.

[0022] In still another embodiment, a symmetrical fabric foot pocket fora swim fin comprises an upper symmetrical portion and a lowersymmetrical portion. The upper symmetrical portion has a firststretchable fabric layer, a second less-stretchable fabric layerdisposed over at least a portion of an upper surface of the firststretchable fabric layer, and a heel strap. The lower symmetricalportion has a stretchable fabric bottom layer. The lower symmetricalportion extends generally parallel to the upper symmetrical portion.

BRIEF DESCRIPTION OF THE DRAWINGS

[0023] These and other features, aspects and advantages of the presentinvention are described below with reference to a preferred embodiment,that is intended to illustrate, but not to limit the present invention.The drawings contain five figures.

[0024]FIG. 1 is a side elevational view of a swim fin incorporatingfeatures of the present invention;

[0025]FIG. 2 is an exploded perspective view of the bottom of the swimfin of FIG. 1;

[0026]FIG. 3 is top view of the swim fin of FIG. 1;

[0027]FIG. 4 is a bottom view of the swim fin of FIG. 1, with the heelstrap portion removed; and

[0028]FIG. 5 is a cross-sectional view of the swim fin of FIG. 1, takenalong the cross-sectional line identified by the reference numeral 5 inFIG. 4.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0029]FIG. 1 illustrates a swim fin 10, including a fabric foot pocket12. The swim fin 10 is described herein with reference to one preferredembodiment. In a preferred embodiment of the present invention a fabricfoot pocket 12, a fin blade 14, and a fin sole 16 are joined together toform a swim fin 10.

[0030] Fabric Foot Pocket

[0031] As shown in FIGS. 1 through 3, the fabric foot pocket 12 has afabric pocket portion 18 and a heel strap portion 20. The fabric pocketportion 18 preferably covers a portion of a user's foot from the user'stoes to about the user's arch and, more desirably, to about the centerof the user's arch. The heel strap portion 20 preferably defines a spacefor a user's heel, such that when the swim fin is worn by a user, theuser's heel extends beyond the fabric pocket portion 18 of the footpocket 12. Additionally, the user's heel preferably extends beyond thefin blade 14 and fin sole 16. The fabric pocket portion 18 preferablyextends over an edge of the fin blade 14 and fin sole 16 to provide acomfortable fit for the user. The heel strap portion 20 passes aroundthe back of the heel of the user and is connected to each side of thefabric pocket portion 18 to hold the foot of the user within the footpocket 12.

[0032] The fabric foot pocket 12 has an open heel configuration that ispreferable to foot holding elements used on some other fins. Closed heelconfigurations generally fit only one size foot. The foot of a user maynot fit precisely in a fin having a closed heel configuration, such as,for example, a bootie or fin sock. The foot holding element may be toolarge or too small for a user's foot. Additionally, fins with closedheel configurations may trap more sand or foreign objects within thefoot holding element. An open heel configuration with an adjustable heelstrap portion 20 allows for a precise fit on the user's foot.Additionally, the same fin may accommodate feet of varying sizes simplyby adjusting the heel strap portion 20. Finally, the open heelconfiguration is less likely to trap sand and foreign objects.

[0033] The fabric foot pocket 12 has a closed toe configuration that ispreferable to foot holding elements used on some other fins. Open toeconfigurations generally expose a user's toes to objects in the waterthat may harm the user, such as, for example, rocks or coral.Additionally, open toe configurations do not generally insulate the toesof a user from cold water. The closed toe configuration of the footpocket protects the user's toes from injury and acts to insulate theuser's foot from cold water.

[0034] The fabric foot pocket 12 has a comfortable fabric pocket portion18 that is preferable to foot holding elements used on some other fins.Some fins incorporate foot holding elements that have a generally rigidconstruction. These types of foot holding elements may be rigid aboutthe toe region. In some cases, a user may develop a foot cramp becausethe toe portion of the rigid foot holding element may be confining theuser's toes. Additionally, these types of foot holding elements may berigid on the instep region or other locations where the foot of the usermay rub and chafe. The comfortable fabric pocket portion 18 of the footpocket 12 comfortably holds the foot of the user on the fin.

[0035] The foot pocket 12 preferably has a generally symmetrical shapeabout a longitudinal centerline. Foot pockets with a generallysymmetrical shape have advantages over asymmetrical foot pockets, suchas foot pockets that are formed to resemble the shape of a user's foot.Symmetrical pockets help ensure a balanced distribution of force overthe fin blade. Additionally, symmetrical pockets tend to hold a user'sfoot in a position that help's prevent rotation of the fin blade duringuse. Such rotation can be the cause of injuries to the user or loss ofpropulsive force during use. Furthermore, symmetrical pockets arecheaper and easier to manufacture and assemble than asymmetrical footpockets. Finally, swim fins with symmetrical foot pockets often may beused interchangeably on either foot providing users with greaterflexibility when dealing with multiple pairs of fins.

[0036] The foot pocket 12 has an upper portion 22 and a lower portion24. The lower portion 24 of the foot pocket 12 will be discussed furtherbelow. The upper portion 22 of the foot pocket 12 preferably has a firstlayer of stretchable fabric 26. The first layer of stretchable fabric 26preferably is a stretchable foam fabric, such as, for example, Neoprene.The first layer of stretchable fabric 26 preferably is a strip of fabrichaving at least one curved end. Preferably, the curved end of the firstfabric layer generally forms an arc. Preferably, the curved end of thefabric corresponds to the toe region of the foot pocket 12. The firstlayer of stretchable fabric preferably provides a comfortable fit aboutthe toes and arch of the user while holding the foot snuggly.

[0037] The upper portion 22 of the foot pocket 12 preferably has asecond layer of fabric 28. The second layer of fabric 28 preferably isless stretchable than the first layer of fabric 26. The second layer offabric 28 preferably is made of a fabric such as, for example, Corduraor Codra. The second layer of fabric 28 preferably is a strip of fabrichaving at least one curved end. Preferably, the curved end of the secondfabric layer generally forms an arc. Preferably, the curved end of thefabric corresponds to the toe region of the foot pocket 12. The secondlayer 28 preferably corresponds in shape with at least a portion of thefirst layer 26. Preferably, the curved end of the second layer 28corresponds with the curved end of the first layer 26. The second layer28 preferably is shorter than the first layer 26. The second layer 28preferably does not extend in a direction opposite its curved end as faras the first layer 26 extends in a direction opposite its curved end.The second less stretchable fabric layer 28 provides increased supportto the upper portion 22 of the foot pocket 12 while maintainingflexibility. The extra support is useful to help transfer force from theuser's foot to the fin blade 14 as the user kicks. Additionally, thesecond less stretchable fabric layer 28 of the foot pocket 12 helpsprevent tearing of the foot pocket 12.

[0038] The second less stretchable fabric layer 28 of the foot pocket 12preferably does not give or flex significantly under the force generatedby the user's kick. The second less stretchable fabric layer 28preferably provides a surface that is strong enough to accommodate thefull force of the user's downward stroke and transfer that force to thefin blade 14, generating increased propulsion for the user.

[0039] The second layer 28 of the upper portion 22 preferably is joinedto the first layer 26 of the upper portion 22. The second layer 28preferably is placed over the first layer 26 such that the curved endsof the layers are aligned and the first layer 26 extends beyond thesecond layer 28 in a direction opposite the curved ends. The secondlayer 28 preferably is joined to the first layer 26 at least at alocation where the first layer 26 extends beyond the second layer 28,.The layers preferably are joined together with at least one strip oftape material 30, such as, for example, Nylon tape, being placed overthe two layers 26, 28 and sewn down with thread 32, such as, forexample, Nylon thread. Preferably, at least a second strip of tapematerial 34 is placed over the two layers 26, 28 and the first strip oftape material 30, and sewn down with thread 36, to strengthen theconnection between the layers. Preferably, the connection between thefirst stretchable layer 26 and the second less stretchable layer 28 isstrong enough, and provides adequate support for the layers 26, 28, sothat the layers 26, 28 do not tear or pucker under the forces generatedby normal use.

[0040] The upper portion 22 of the foot pocket 12 preferably comprisesan instep strap 38, as best seen in the cross sectional view of FIG. 5.The instep strap 38 preferably is an adjustable strap. The instep strap38 provides additional support along the instep of the foot of the user.By adjusting the instep strap 38 to fit snuggly over the top of the footthe force generated by the foot can be transferred to the fin blade moreeffectively. The instep strap 38 preferably has a first piece 40 and asecond piece 42. The pieces preferably comprise fabric material such as,for example, Nylon webbing. The first piece 40 of the instep strap 38preferably has a section of fabric including either hook or loopfasteners. The second piece 42 of the instep strap 38 preferably has asection of fabric including either loop or hook fasteners to releasablyjoin with the hook or loop fasteners of the first piece 40 of the instepstrap 38.

[0041] Preferably, a section 44 of the first piece 40 of the instepstrap 38 is attached toward one side 46 of the fabric pocket portion 18such that the two ends 48, 50 of the first piece 40 extend towardanother side 52 of the fabric pocket portion 18 where the second piece42 of the instep strap 38 is attached. The second piece 42 of the instepstrap 38 preferably has the loop or hook fasteners on upper and lowersides of the piece. The first piece 40 of the instep strap 38 preferablyhas hook or loop fasteners on the two ends 48, 50 of the of first piece40 such that one end 48 is fastened to the upper side of the secondpiece 42 and the other end 50 is fastened to the lower side of thesecond piece 42.

[0042] The first piece 40 of the instep strap 38 preferably also has asection of material, such as, for example, Nylon tape, extending from atleast one end to form a pull-tab (not shown). The instep strap 38preferably is joined to the upper portion 22 of the foot pocket 12.Preferably the instep strap 38 is joined to the first layer 40 of theupper portion 22 of the foot pocket 12, toward side edges 46, 52 of thefabric pocket portion 18, as will be described further.

[0043] Additionally, in other embodiments, the instep strap 38 may be asingle strap that is joined to one side of the foot pocket 12. Theinstep strap 38 may be placed over the instep of the user's foot andthrough a loop on another side of the foot pocket 12. The instep strap38 may then be adjustably fastened by folding the instep strap 38 backon itself and releasably attaching one part of the instep strap 38 toanother part of the instep strap 38 using hook and loop fasteners.

[0044] Referring to FIG. 3, a portion 54 of the first fabric layer 26 ofthe upper portion 22 of the foot pocket 12 preferably is folded up andover the instep strap 38. Advantages of folding a portion 54 of thefirst fabric layer 26 over the instep strap include, first, providing astreamlined housing for the instep strap to reduce drag on the fin thatmay be caused by the instep strap as the user travels through the water,and second, providing a soft rolled edge or surface for contacting thefoot of the user to prevent chaffing and blistering. An end of thefolded portion 54 preferably is turned under and stitched forming afinished edge 56. The folded portion 54 of the first fabric layer 26covering the instep strap 38 preferably is joined at least to anotherportion of the first fabric layer 26 toward its side edges 46, 52, aswill be described further.

[0045] The foot pocket 12 has a heel strap portion 20 that is joined tothe upper portion 22 of the foot pocket 12 on the fabric pocket portion18. Preferably the heel strap portion 20 comprises side sections 58, 60that are attached to the upper portion 22 of the foot pocket 12. Theheel strap side sections 58, 60 preferably comprise a relativelynon-stretchable material such as, for example, Nylon webbing. The heelstrap portion 20 has advantages over heel strap portions of some otherswim fins. Some swim fins have heel straps that are fastened throughpins that are molded into the fin blade. The pins on some of these typesof fins may break through the fin blade. Additionally, some swim finshave heel straps that have multiple or complicated fitting parts,including metal parts. These parts may break or corrode after prolongedexposure to the water. The heel strap portion 20 has the advantage ofdistributing force over the foot pocket to reduce the likelihood ofbreakage. Additionally, the materials used in the heel strap portion andfoot pocket are less likely to corrode.

[0046] The side sections 58, 60 of the heel strap 20 preferably extendalong sides of the upper portion 22 of the foot pocket 12. The sidesections 58, 60 of the heel strap 20 preferably are attached to at leastpart of the second fabric layer 28 of the upper portion 22. The sidesections 58, 60 of the heel strap 20 preferably are also attached to atleast part of one or more strips of tape material 30, 34 joining thefirst fabric layer 26 with the second fabric layer 28 of the upperportion 22 of the foot pocket 12. Additionally, each side section 58, 60of the heel strap 20 preferably is attached to the first fabric layer 26of the upper portion 22 and also attached to one of the pieces 40, 42 ofthe instep strap 38 toward a respective side edge 46, 52 of the fabricpocket portion 18.

[0047] One of the side sections 58 of the heel strap 20 preferablypasses under the folded portion 54 of the first fabric layer 26, througha slit formed near the location where the material is folded. The otherside section 60 of the heel strap 20 preferably passes over, and is alsoattached to, the folded portion 54 of the first fabric layer 26, suchthat the folded portion 54 is bound, on that respective side edge, tothe side section 60 of the heel strap 20, one of the pieces 42 of theinstep strap 38, and the rest of the first layer 26 of, the upperportion 22.

[0048] The heel strap portion 20 of the foot pocket 12 preferablycomprises a buckle 62. The buckle 62 preferably is attached to the sidesection 60 of the heel strap 20 that passes over the folded portion 54of the first fabric layer 26 of the upper section 22 of the fabric footpocket 12. The buckle 62 preferably has a double bar configuration. Theside section 60 of the heel strap 20 that passes over the folded portion54 of the foot pocket 12 preferably is looped over one of the bars ofthe buckle 62 and attached to the upper portion 22 of the foot pocket 12on both sides of the loop 64. The buckle 62 preferably is a curvedtension lock buckle with a high release. The buckle 62 preferably ismade of a plastic material such as, for example, Acetal or Nylonplastic.

[0049] The heel strap portion 20 of the foot pocket 12 preferablycomprises a central strap section 66 and an extension strap section 68.The central strap section 66 of the heel strap 20 preferably comprises apad 70, a stretchable strap segment 72, and a strap keeper 74. The pad70 preferably is a stretchable fabric such as, for example, Neoprene. Inorder to enhance comfort and distribute the force acting on the heel,the pad 70 is desirably about an inch and a half wide. Additionally, thepad is preferably thicker than, and at least as soft as, the stretchablestrap segment 72. Desirably, the pad is at least about an eighth of aninch thick and at least as soft as Neoprene. The stretchable strapsegment 72 preferably is an elastic strap having a combination offabrics, such as, for example, rubber and Nylon, woven together. Anadvantage of a stretchable strap segment 72 is that the strap will fittightly on the heel of the user and stretch open for ease of entry orexit of the user's foot.

[0050] The pad 70 preferably is joined to the stretchable strap segment72. Preferably, the pad 70 is sewn directly onto the stretchable strapsegment 72. The strap keeper 74 preferably is a loop of plasticmaterial, such as, for example, Nylon plastic, that preferably issecured between the pad 70 and the stretchable strap segment 72, theloop extending away from the pad 70 to receive the loose end of theextension strap segment 68 described further below.

[0051] One side of the central strap section 66 is joined to the sidesection 58 of the heel strap 20 that passes under the folded portion 54of the foot pocket 12. An end 76 of the side section 58 of the heelstrap 20 passing under the folded portion 54 extends beyond an edge ofthe fabric pocket portion 18 of the foot pocket 12. The end 76 of theside section 54 preferably is joined to both the stretchable strapsegment 72 and the pad 70 of the central strap section 66 of the heelstrap 20. Additionally, an end 78 of the pad 70 closest the end 76 ofthe side section 58 preferably extends beyond the edge of thestretchable strap segment 76, toward the fabric pocket portion 18 of thefoot pocket 12, and preferably is joined to the first fabric layer 26 ofthe upper portion 22 of the foot pocket 12.

[0052] The heel strap portion 20 of the foot pocket 12 preferablycomprises an extension strap section 68. The extension strap section 68of the heel strap 20 preferably is a relatively non-stretchable materialsuch as, for example, Nylon webbing. The extension strap section 68preferably is joined to both the stretchable strap segment 72 and thepad 70 of the central strap section 66 of the heel strap 20. Theextension strap section 68 preferably is sufficiently long to be loopedthrough the buckle 62. The extension strap section 68 can be movedthrough the buckle 62 to adjust the effective length of the heel strapportion 20 relative to the ends of the fabric foot pocket 18. The looseend of the extension strap section 68 can be placed through the loop ofthe strap keeper 74 located on the central strap section 66.

[0053] As mentioned previously, the foot pocket 12 has an upper portion22 and a lower portion 24. The lower portion 24 of the foot pocket 12extends generally parallel to the upper portion 22. The lower portion 24of the foot pocket 12 preferably comprises at least a bottom layer ofstretchable fabric 80. The bottom layer of stretchable fabric 80preferably is a stretchable foam fabric, such as, for example, Neoprene.The bottom layer of stretchable fabric 80 preferably is a strip offabric having at least one curved end. Preferably, the curved end of thebottom fabric layer 80 generally forms an arc. Preferably, the curvedend of the fabric corresponds to the toe region of the foot pocket 12.

[0054] The bottom layer 80 preferably corresponds in shape with at leasta portion of the first layer 26 of the upper portion 22 of the footpocket 12. Preferably, the curved end of the bottom layer 80 correspondswith the curved ends of the first and second layers 26, 28 of the upperportion 20. The bottom layer 80 preferably is shorter than the firstlayer 26 of the upper portion 22 and preferably longer than the secondlayer 28 of the upper portion 22. The bottom layer 80 preferably doesnot extend in a direction opposite its curved end as far as the firstlayer 26 extends in a direction opposite its curved end, when the firstlayer 26 is in an unfolded orientation. However, when the first layer 26of the upper portion 22 is folded over, as described previously, thelength of the first layer 26, from the curved end to the fold,preferably is generally the same as the length of the bottom layer 80from its curved end to its opposite end. The bottom layer 80 preferablyextends in a direction opposite its curved end further than the secondlayer 28 of the upper portion 22 extends in a direction opposite itscurved end.

[0055] The bottom layer 80 of the lower portion 24 of the foot pocket 12preferably defines one or more drain holes 82. The bottom layer 80preferably defines at least one relatively larger primary drain hole 84and preferably multiple relatively smaller secondary drain holes 86, ofpotentially various sizes, preferably located toward the curved end ofthe bottom layer 80 and extending toward the sides 88, 90 of the bottomlayer 80. Preferably, a series of smaller secondary drain holes 86extend further toward the toe region and the side portions 88, 90 of thestretchable fabric bottom layer 80 than the primary drain hole 84extends toward the toe region and the side portions 88, 90.

[0056] The sizes of the drain holes 82 may vary depending on the size ofthe fin 10. In one embodiment, the primary drain hole 84 preferably isabout one half of an inch in diameter, a centrally located secondarydrain hole 86 preferably is about one quarter of an inch in diameter,and other secondary drain holes 86 preferably are about one eighth of aninch in diameter. Incorporating multiple holes 82 in the foot pocket 12allows for better drainage of sand and water from the foot pocket whilemaintaining the strength and integrity of the foot pocket 12. Byincreasing the number of holes defined in the foot pocket, and spreadingthem out over the toe and side regions where sand may accumulate, morewater is likely to circulate in the foot pocket 12 to flush out sand andother foreign objects.

[0057] The upper portion 22 of the foot pocket 12 preferably is joinedto the lower portion 24 of the foot pocket 12 such that a space 92 isdefined between the upper and lower portions 22, 24. As previouslydiscussed, the upper portion 22, preferably comprises first and secondlayers 26, 28 (preferably aligned and joined with at least one strip oftape material 30), a heel strap portion 20 (preferably having heel strapside sections 58, 60, a buckle 62, a central strap section 66, and anextension strap section 68), and an instep strap 38 (preferably coveredby a folded over portion 54 of the first layer 26). The lower portion 24preferably comprises a bottom layer 80 as described above.

[0058] The upper portion 22 preferably is placed over the lower portion24 such that the curved ends of the first and second layers 26, 28 ofthe upper portion 22 are aligned with the bottom layer 80 of the lowerportion 24. The lower portion 24 preferably is joined to the upperportion 22 at least around the curved ends and along the side portions88, 90, the upper and lower portions 22, 24 forming a pocket 92 havingan opening at an end opposite the curved ends. The upper and lowerportions 22, 24 preferably are joined together with at least one stripof webbing material (not shown), such as, for example, Nylon webbing,being placed around the edges of the upper and lower portions 22, 24.The upper and lower portions 22, 24 and upper and lower ends of thewebbing material preferably are sewn together at least around the curvedends and along the side portions 88, 90 of the upper and lower portions22, 24 of the foot pocket 12.

[0059] The complete foot pocket 12, including upper and lower portions22, 24, preferably is placed on the fin blade 14 and joined to the finblade 14 and fin sole 16 as described below.

[0060] Fin Blade

[0061] The fin blade 14 preferably comprises a tip portion 94 at one endof the blade 14 and a foot pocket receiving portion 96 at another end ofthe blade 14. The fin blade 14 also comprises side ribs 98, 100extending from the tip portion 94 to the foot pocket receiving portion96 along the edges of the blade 14. The fin blade 14 has a blade deck102 located generally between the tip portion 94 and the foot pocketreceiving portion 96 and between the side portions of the blade 14. Thefin blade 14 preferably is a single molded piece of plastic.

[0062] The fin blade 14 preferably has a generally symmetrical shapeabout a longitudinal centerline. The tip 94 of the blade 14 preferablyhas two side edges 104, 106 that are about equidistant from alongitudinal centerline and about equidistant from the foot pocketreceiving portion 96. A center section 108 of the tip 94 of the blade 14preferably extends beyond the side edges 104, 106 to form a central tip108 located along a longitudinal centerline. The symmetrical shape ofthe fin blade 14 spreads the force generated during a user's kickequally across the width of the blade 14. Accordingly, permanent bladewarping and stress on a user's ankles and knees that may be associatedwith nonsymmetrical blades are greatly reduced and more propulsive forceis generated.

[0063] Embodiments of the invention may include fins of many differentlengths or structures. The length and shape of a fin blade preferablymay vary depending on the type of activity the fin is designed for. Forexample, in one embodiment, the swim fin is a surf style swim findesigned for use while body surfing or body boarding. In one embodimentof a surf style swim fin, the fin blade preferably is from about 10inches long to about 16 inches long. Other embodiments of the inventioninclude fitness fins, skin diving fins, SCUBA diving fins, and manyother types of fins. The length of the fin blade may vary significantlydepending on the type of intended use or the type of user.

[0064] The foot pocket receiving portion 96 of the fin blade 14preferably has a shape that generally corresponds to the shape of thefabric foot pocket 12. The foot pocket receiving portion 96 preferablyhas a generally symmetrical shape about a longitudinal centerline tocorrespond with a symmetrical fabric foot pocket 12. The foot pocketreceiving portion 96 preferably has a support portion 110 for contactingthe fabric foot pocket 12.

[0065] The support portion 110 of the foot pocket receiving portion 96preferably extends generally parallel to the blade deck 102. Theparallel extension of the support portion 110 of the foot pocketreceiving portion 96 relative to the blade deck 102 holds the footpocket 12 generally parallel to the blade deck 102. This allows a userto kick without creating undue stress on the user's foot or ankle thatmay be caused if the support portion 110 of the foot pocket receivingportion 96 is angled relative to the blade deck 102. Some angledconfigurations of the support portion 110 may tend to cause a user'sfoot rotate, potentially injuring the user or resulting in lesspropulsive force generated by the user.

[0066] Additionally, the foot pocket receiving portion 96 preferablydefines one or more holes 112 corresponding to the holes 82 defined inthe bottom layer 80 of the lower portion 24 of the fabric foot pocket12. The holes 112 may be the same size and configuration as the holes 82in the fabric foot pocket 12, or they may be of different sizes andconfigurations. Preferably, the holes 112 are defined and configuredsuch that water and sand can be flushed from the fabric foot pocket 12out of the fin 10.

[0067] The sizes of the holes 112 may vary depending on the size of thefin 10. In one embodiment, one of the holes 112, preferablycorresponding to the primary drain hole 84, desirably is about one inchin diameter, while other holes 112, corresponding to secondary drainholes 86, preferably are about one quarter of an inch in diameter toabout three eighths of an inch in diameter. In some embodiments, holes112 may be formed during the molding process. In some embodiments, holes112 may be punched or drilled following the molding process.

[0068] The fin blade 14 preferably has fillets 114 along intersectionsof the side ribs 98, 100 and the blade deck 102. The fillets 114 arecurved portions of the fin blade 14 that join the side ribs 98, 100 tothe top and bottom surfaces of the blade deck 102. Incorporating fillets114 along intersections of side ribs 98, 100 and blade decks 102provides greater strength against bending than a swim fin having sideribs that join the blade deck at right angles. The added strength of theblade creates greater propulsion forces for the user.

[0069] The fin blade 14 preferably has a plurality of grooves 116defined on a surface of the blade deck 102. Preferably, the grooves 116are defined on upper and lower surfaces of the blade deck 102.Preferably, the grooves 116 extend from the foot pocket receivingportion 96 to the tip portion 94 of the blade 14. The grooves 116 act aswater flow channels that direct the water toward the tip 94 of the finblade 14 as a user moves forward through the water. The grooves 116preferably are uninterrupted by surfaces that would create turbulence.The grooves 116 help to prevent drag on the fin that can be caused byalternative grooves or waffle designs that are oriented on the blade sothat they interfere with the free flow of water toward the tip of theblade, which is the end of the blade as a user moves forward through thewater.

[0070] Additionally, the fin blade 14 preferably has a tapered strut 118extending out from the blade deck 102 along the bottom surface of thefin blade 14. The strut 118 provides further support for the fin blade14 and keeps it from folding or bending excessively.

[0071] Fin Sole

[0072] The fin sole 16 has a base portion 120 preferably with tread 122formed thereon. The tread 122 preferably is diamond shaped andpreferably is distributed uniformly over the sole 16. An advantage oftread 122 is to assist in preventing a user from slipping when walkingon hard surfaces such as boat docks, rocks or jetties. The fin sole 16preferably is a single molded piece of plastic or rubber material.Additionally, in some other embodiments of the invention, the fin sole16 may be formed as an integral part of the fin blade 14 rather than asa separate piece.

[0073] The fin sole 16 preferably has a shape that generally correspondsto the shape of the foot pocket receiving portion 96 on the fin blade14. The fin sole 16 preferably has a generally symmetrical shape about alongitudinal centerline to correspond with a symmetrical foot pocketreceiving portion 96. The sole 16 preferably is joined to a lowersurface of the fin blade 14 at the foot pocket receiving portion 96. Thesole 16 preferably has a fabric material, such as, for example, Nylonwebbing, attached along its outer edges. The fabric material preferablyis attached to the upper and lower surfaces of the sole 16 along theedges of the sole 16. Strips of fabric material preferably extend fromthe sole 16 near the side edges of the sole 16 nearest the opening 92 inthe foot pocket 12. The strips of fabric material preferably are foldedup around the edge of the fin blade and joined with the foot pocket inthe assembly process.

[0074] Additionally, the fin sole 16 preferably defines one or moreholes 124 corresponding to the holes 82 defined in the bottom layer 80of the lower portion 24 of the fabric foot pocket 12 or the holes 112defined in the foot pocket receiving portion 96 of the fin blade 14. Theholes 124 may be the same size and configuration as the holes 82, 112 inthe fabric foot pocket 12 or fin blade 14, or they may be of differentsizes and configurations. Preferably, the holes 124 are defined andconfigured such that water and sand can be flushed from the fabric footpocket 112 out of the fin 10. Additionally, the size and configurationof the holes 82, 112, 124 in the swim fin 10 preferably are sized andconfigured to allow for adequate flushing of the foot pocket 12 whilemaintaining strength and integrity of the support portion 110 of thefoot pocket receiving portion 96 and the base portion 120 of the finsole 16.

[0075] The sizes of the holes 124 may vary depending on the size of thefin 10. In one embodiment, one of the holes 124, preferablycorresponding to the primary drain hole 84, desirably is about one inchin diameter, while other holes 124, corresponding to secondary drainholes 86, preferably are about one quarter of an inch in diameter toabout three eighths of an inch in diameter. Additionally, the supportportion 110 of the foot pocket receiving portion 96 preferably is atleast about one sixteenth of an inch thick and the base portion 120 ofthe fin sole 16 preferably is about one eighth of an inch thick. In someembodiments, holes 124 may be formed during a molding process. In someembodiments, holes 124 may be punched or drilled following a moldingprocess. Incorporating multiple holes of varying sizes spread over abottom portion of the fin, as opposed to a single large central hole,provides drainage to a greater effective area while maintaining thestrength and stability of the foot pocket 12, fin blade 14 and fin sole16.

[0076] The base 120 of the fin sole 16 preferably is configured suchthat, when the base 120 of the fin sole,16 is joined to the foot pocketreceiving portion 96 of the fin blade 14, the base portion 120 of thefin sole 16 extends generally parallel to the blade deck 102. Theextension of the base 120 of the fin sole 16 generally parallel to theblade deck 102 allows the user to keep the fin blade 14 generallyparallel with the bottom of the user's foot. This allows the user tomaximize the propulsive force of each kick. Additionally, the user isbetter able to walk or run outside of the water because the fin blade 14is elevated with respect to the fin sole 16, and the fin blade 14 is notangled substantially relative to the fin sole 16. Fin blades that areangled relative to fin soles may experience increased wear on the blade,and may cause the user to walk unevenly. Accordingly, a swim fin havinga blade 14 that is elevated from, and generally parallel to, the base120 of the fin sole 16 maximizes propulsion, acts to prevent wear on thefin blade 14, and facilitates walking or running by the user.

[0077] Swim Fin

[0078] As best shown in FIGS. 2, 3 and 4, the swim fin 10 preferably isformed by placing the fabric foot pocket 12, having an upper portion 22and lower portion 24, over the fin blade 14 at the foot pocket receivingportion 96. Additionally, the fin sole 16 is placed below the fin blade14 at the foot pocket receiving portion 96. The fabric foot pocket 12,and the fin sole 16 preferably have generally corresponding shapes foralignment with the foot pocket receiving portion 96 of the fin blade 14.The fin sole 16 preferably is glued onto a bottom portion of the footpocket receiving portion 96.

[0079] The fabric foot pocket 22 preferably is sewn to the fin blade 14and the fin sole 16 around the curved end and side portions 88, 90.Preferably, strips of fabric material of the fin sole 16 are folded uparound the edge of the fin blade 14 and joined with the foot pocket 12in the assembly process. The lower portion 24 of the fabric foot pocket12 preferably is also sewn to the fin blade 14 and the fin sole 16 alongthe open edge of the foot pocket 12. Preferably, the stitch attachingthe lower portion 24 of the fabric foot pocket 12 to the fin blade 14and fin sole 16 does not extend all the way to the side portions 88, 90of the foot pocket 12. The spaces on either side of the stitch act toallow water to enter the fin between the foot pocket 12 and the finblade 14 and facilitate flushing sand out of the fin. Additionally, thelower portion 24 of the foot pocket preferably extends slightly beyondthe edge of the fin blade 14 and the fin sole 16 to comfortably protectthe bottom of the user's foot from chaffing or cuts.

[0080] The embodiments described above include many features thatimprove the comfort and performance of a swim fin, and that effectivelyreduce manufacturing and production costs. Although this invention hasbeen disclosed in the context of a preferred embodiments, it will beunderstood by those of skill in the art that the present inventionextends beyond the specifically disclosed embodiments to otheralternative embodiments and/or uses of the invention and obviousmodifications and equivalents thereof. Accordingly, the invention is tobe defined solely by the appended claims.

What is claimed is:
 1. A swim fin comprising a symmetrical fin bladehaving a foot pocket receiving portion; and a fabric foot pocket beingjoined to an upper surface of the symmetrical fin blade at the footpocket receiving portion.
 2. The swim fin of claim 1, wherein the footpocket receiving portion and the fabric foot pocket are symmetrical. 3.The swim fin of claim 2, additionally comprising a sole being joined toa lower surface of the fin blade at the foot pocket receiving portion,wherein the sole is symmetrical.
 4. The swim fin of claim 1, wherein thesymmetrical fin blade additionally comprises a tip portion, a bladedeck, and side ribs extending from the foot pocket receiving portion tothe tip portion along side portions of the blade deck, and the footpocket receiving portion has a support portion extending generallyparallel to the blade deck.
 5. The swim fin of claim 1, wherein thesymmetrical fin blade additionally comprises a tip portion, a bladedeck, and side ribs extending from the foot pocket receiving portion tothe tip portion along side portions of the blade deck, and thesymmetrical fin blade has fillets along intersections of the side ribsand the blade deck.
 6. The swim fin of claim 1, wherein the symmetricalfin blade additionally comprises a tip portion, a blade deck, and sideribs extending from the foot pocket receiving portion to the tip portionalong side portions of the blade deck, and the symmetrical fin blade hasa plurality of grooves on upper and lower surfaces of the blade deckextending from the foot pocket receiving portion to the tip portion. 7.The swim fin of claim 1, additionally comprising a sole being joined toa lower surface of the symmetrical fin blade at the foot pocketreceiving portion, wherein the fin blade additionally comprises a tipportion, a blade deck, and side ribs extending from the foot pocketreceiving portion to the tip portion along side portions of the bladedeck, and wherein the sole has a base portion extending generallyparallel to the blade deck.
 8. The swim fin of claim 1, wherein thefabric foot pocket has an upper portion and a lower portion, and theupper portion has a first stretchable fabric layer, a secondless-stretchable fabric layer disposed over at least a portion of anupper surface of the first stretchable fabric layer, and a heel strapportion with a strap keeper loop and a buckle that has a double barconfiguration.
 9. The swim fin of claim 1, wherein the fabric footpocket has an upper portion and a lower portion, and the lower portionextends generally parallel to the upper portion.
 10. The swim fin ofclaim 1, wherein the fabric foot pocket has an upper portion and a lowerportion, the lower portion has a stretchable fabric bottom layerdefining multiple drain holes, the multiple drain holes include aprimary drain hole and a series of smaller secondary drain holes, andthe series of smaller secondary drain holes include drain holes beingdefined such that the series of smaller secondary drain holes extendsfurther toward a toe region and side portions of the stretchable fabricbottom layer than the primary drain hole extends.
 11. The swim fin ofclaim 10, additionally comprising a sole being joined to a lower surfaceof the symmetrical fin blade at the foot pocket receiving portion,wherein the sole and the symmetrical fin blade define multiple drainholes generally corresponding to the multiple drain holes defined in thestretchable fabric bottom layer of the lower portion of the fabric footpocket.
 12. A swim fin comprising a fin blade having a symmetrical footpocket receiving portion; and a symmetrical fabric foot pocket beingjoined to an upper surface of the fin blade at the symmetrical footpocket receiving portion.
 13. The swim fin of claim 12, wherein the finblade is symmetrical.
 14. The swim fin of claim 12, additionallycomprising a sole being joined to a lower surface of the fin blade atthe symmetrical foot pocket receiving portion, wherein the sole issymmetrical.
 15. The swim fin of claim 12, wherein the fin bladeadditionally comprises a tip portion, a blade deck, and side ribsextending from the symmetrical foot pocket receiving portion to the tipportion along side portions of the blade deck, and the symmetrical footpocket receiving portion has a support portion extending generallyparallel to the blade deck.
 16. The swim fin of claim 12, wherein thefin blade additionally comprises a tip portion, a blade deck, and sideribs extending from the symmetrical foot pocket receiving portion to thetip portion along side portions of the blade deck, and the fin blade hasfillets along intersections of the side ribs and the blade deck.
 17. Theswim fin of claim 12, wherein the fin blade additionally comprises a tipportion, a blade deck, and side ribs extending from the symmetrical footpocket receiving portion to the tip portion along side portions of theblade deck, and the fin blade has a plurality of grooves on upper andlower surfaces of the blade deck extending from the symmetrical footpocket receiving portion to the tip portion.
 18. The swim fin of claim12, additionally comprising a sole being joined to a lower surface ofthe fin blade at the symmetrical foot pocket receiving portion, whereinthe fin blade additionally comprises a tip portion, a blade deck, andside ribs extending from the symmetrical foot pocket receiving portionto the tip portion along side portions of the blade deck, and whereinthe sole has a base portion extending generally parallel to the bladedeck.
 19. The swim fin of claim 12, wherein the symmetrical fabric footpocket has an upper portion and a lower portion, and the upper portionhas a first stretchable fabric layer, a second less-stretchable fabriclayer disposed over at least a portion of an upper surface of the firststretchable fabric layer, and a heel strap portion with a strap keeperloop and a buckle that has a double bar configuration.
 20. The swim finof claim 12, wherein the symmetrical fabric foot pocket has an upperportion and a lower portion, and the lower portion extends generallyparallel to the upper portion.
 21. The swim fin of claim 12, wherein thesymmetrical fabric foot pocket has an upper portion and a lower portion,the lower portion has a stretchable fabric bottom layer definingmultiple drain holes, the multiple drain holes include a primary drainhole and a series of smaller secondary drain holes, and the series ofsmaller secondary drain holes include drain holes being defined suchthat the series of smaller secondary drain holes extends further towarda toe region and side portions of the stretchable fabric bottom layerthan the primary drain hole extends.
 22. The swim fin of claim 21,additionally comprising a sole being joined to a lower surface of thefin blade at the symmetrical foot pocket receiving portion, wherein thesole and the fin blade define multiple drain holes generallycorresponding to the multiple drain holes defined in the stretchablefabric bottom layer of the lower portion of the symmetrical fabric footpocket.
 23. A swim fin comprising a fin blade having a foot pocketreceiving portion, a tip portion, a blade deck, and side ribs extendingfrom the foot pocket receiving portion to the tip portion along sideportions of the blade deck, the foot pocket receiving portion having asupport portion extending generally parallel to the blade deck; and afabric foot pocket being joined to an upper surface of the fin blade atthe foot pocket receiving portion.
 24. The swim fin of claim 23, whereinthe fin blade is symmetrical.
 25. The swim fin of claim 23, wherein thefoot pocket receiving portion and the fabric foot pocket aresymmetrical.
 26. The swim fin of claim 25, additionally comprising asole being joined to a lower surface of the fin blade at the symmetricalfoot pocket receiving portion, wherein the sole is symmetrical.
 27. Theswim fin of claim 23, wherein the fin blade has fillets alongintersections of the side ribs and the blade deck.
 28. The swim fin ofclaim 23, wherein the fin blade has a plurality of grooves on upper andlower surfaces of the blade deck extending from the foot pocketreceiving portion to the tip portion.
 29. The swim fin of claim 23,additionally comprising a sole being joined to a lower surface of thefin blade at the foot pocket receiving portion, wherein the sole has abase portion extending generally parallel to the blade deck.
 30. Theswim fin of claim 23, wherein the fabric foot pocket has an upperportion and a lower portion, and the upper portion has a firststretchable fabric layer, a second less-stretchable fabric layerdisposed over at least a portion of an upper surface of the firststretchable fabric layer, and a heel strap portion with a strap keeperloop and a buckle that has a double bar configuration.
 31. The swim finof claim 23, wherein the fabric foot pocket has an upper portion and alower portion, and the lower portion extends generally parallel to theupper portion.
 32. The swim fin of claim 23, wherein the fabric footpocket has an upper portion and a lower portion, the lower portion has astretchable fabric bottom layer defining multiple drain holes, themultiple drain holes include a primary drain hole and a series ofsmaller secondary drain holes, and the series of smaller secondary drainholes include drain holes being defined such that the series of smallersecondary drain holes extends further toward a toe region and sideportions of the stretchable fabric bottom layer than the primary drainhole extends.
 33. The swim fin of claim 32, additionally comprising asole being joined to a lower surface of the fin blade at the foot pocketreceiving portion, wherein the sole and the fin blade define multipledrain holes generally corresponding to the multiple drain holes definedin the stretchable fabric bottom layer of the lower portion of thefabric foot pocket.
 34. A swim fin comprising a fin blade having a footpocket receiving portion, a tip portion, a blade deck, and side ribsextending from the foot pocket receiving portion to the tip portionalong side portions of the blade deck, the fin blade having filletsalong intersections of the side ribs and the blade deck; and a fabricfoot pocket being joined to an upper surface of the fin blade at thefoot pocket receiving portion.
 35. A swim fin comprising, a fin bladehaving a foot pocket receiving portion, a tip portion, a blade deck, andside ribs extending from the foot pocket receiving portion to the tipportion along side portions of the blade deck, the fin blade having aplurality of grooves on upper and lower surfaces of the blade deckextending from the foot pocket receiving portion to the tip portion; anda fabric foot pocket being joined to an upper surface of the fin bladeat the foot pocket receiving portion.
 36. A swim fin comprising a finblade having a foot pocket receiving portion; and a fabric foot pocketbeing joined to an upper surface of the fin blade at the foot pocketreceiving portion, the fabric foot pocket having an upper portion and alower portion, the upper portion having a first stretchable fabriclayer, a second less-stretchable fabric layer disposed over at least aportion of an upper surface of the first stretchable fabric layer, and aheel strap portion with a buckle having a double bar configuration. 37.A swim fin comprising a fin blade having a foot pocket receivingportion; and a fabric foot pocket being joined to an upper surface ofthe fin blade at the foot pocket receiving portion, the fabric footpocket having an upper portion and a lower portion, the upper portionhaving a first stretchable fabric layer, a second less-stretchablefabric layer disposed over at least a portion of an upper surface of thefirst stretchable fabric layer, and a heel strap portion with a strapkeeper loop.
 38. A swim fin comprising a fin blade having a foot pocketreceiving portion; and a, fabric foot pocket being joined to an uppersurface of the fin blade at the foot pocket receiving portion, thefabric foot pocket having an upper portion and a lower portion, thelower portion extending generally parallel to the upper portion.
 39. Aswim fin comprising a fin blade having a foot pocket receiving portion;and a fabric foot pocket being joined to an upper surface of the finblade at the foot pocket receiving portion, the fabric foot pockethaving an upper portion and a lower portion, the lower portion having astretchable fabric bottom layer defining multiple drain holes, themultiple drain holes including a primary drain hole and a series ofsmaller secondary drain holes, the series of smaller secondary drainholes including drain holes being defined such that the series ofsmaller secondary drain holes extends further toward a toe region andside portions of the stretchable fabric bottom layer than the primarydrain hole extends.
 40. A swim fin comprising a fin blade having a footpocket receiving portion, a tip portion, a blade deck, and side ribsextending from the foot pocket receiving portion to the tip portionalong side portions of the blade deck; a fabric foot pocket being joinedto an upper surface of the fin blade at the foot pocket receivingportion; and a sole being joined to a lower surface of the fin blade atthe foot pocket receiving portion, the sole having a base portionextending generally parallel to the blade deck.
 41. A swim fincomprising a symmetrical fin blade having a symmetrical foot pocketreceiving portion, a tip portion, a blade deck, and side ribs extendingfrom the symmetrical foot pocket receiving portion to the tip portionalong side portions of the blade deck, the symmetrical foot pocketreceiving portion having a support portion extending generally parallelto the blade deck, the symmetrical fin blade having fillets alongintersections of the side ribs and the blade deck, the symmetrical finblade having a plurality of grooves on upper and lower surfaces of theblade deck extending from the symmetrical foot pocket receiving portionto the tip portion; a symmetrical fabric foot pocket being joined to anupper surface of the symmetrical fin blade at the symmetrical footpocket receiving portion, the symmetrical fabric foot pocket having anupper portion and a lower portion, the upper portion having a firststretchable fabric layer, a second less-stretchable fabric layerdisposed over at least a portion of an upper surface of the firststretchable fabric layer, and a heel strap portion with a strap keeperloop and a buckle having a double bar configuration, the lower portionextending generally parallel to the upper portion and having astretchable fabric bottom layer defining multiple drain holes, themultiple drain holes including a primary drain hole and a series ofsmaller secondary drain holes, the series of smaller secondary drainholes including drain holes being defined such that the series ofsmaller secondary drain holes extends further toward a toe region andside portions of the stretchable fabric bottom layer than the primarydrain hole extends; and a symmetrical sole being joined to a lowersurface of the symmetrical fin blade at the symmetrical foot pocketreceiving portion, the symmetrical sole having a base portion extendinggenerally parallel to the blade deck, the symmetrical sole and thesymmetrical fin blade defining multiple drain holes generallycorresponding to the multiple drain holes defined in the stretchablefabric bottom layer of the lower portion of the symmetrical fabric footpocket.
 42. A method of making a swim fin comprising the steps of:forming a fin blade having a symmetrical foot pocket receiving portion,a tip portion, a blade deck, and side ribs extending from thesymmetrical foot pocket receiving portion to the tip portion along sideportions of the blade deck; forming a symmetrical fabric foot pockethaving an upper portion and a lower portion, the upper portion having afirst stretchable fabric layer, a second less-stretchable fabric layerdisposed over at least a portion of an upper surface of the firststretchable fabric layer, and a heel strap portion, the lower portionextending generally parallel to the upper portion and having astretchable fabric bottom layer; and joining the symmetrical fabric footpocket to an upper surface of the fin blade at the symmetrical footpocket receiving portion.